Superfluous directories in Windows PE image?

I am following the instructions from Microsoft to create a Windows PE image. I want to use this and a batch script to deploy a OS image to computers.

However, the image contains a lot of duplicate language folders, like bg-bg, cs-cz, ... both at the root and in Boot (see below). It doesn't disturb the function of Windows PE, but it is a bit annoying that the root is so cluttered. I sometimes have to look for a file on the boot medium using the command prompt and it is confusing if it looks like this. The Windows installation media which is also based on Windows PE has much less files. I am also pretty sure Windows PE had less files before so maybe this is a bug.

What is the best way to get a clean Windows PE image? I just need English or German (not sure what purpose all the directories serve as there is no chanche to select a language at boot anyway). Is there a minimal Windows PE image one can download, or are there flags I have to pass to copype?